""A Warning Letter To His Royal Highness The Prince Regent"" is a book written by Lionel Thomas Berguer in 1819. The book is primarily intended as a call to action for the middle ranks of society during a critical moment in history. The author addresses the Prince Regent directly, warning him of the dangers facing the country and urging him to take action to address them. Berguer argues that the middle ranks have a vital role to play in shaping the...